#include <stdio.h>
void main()
{
long i;
int j;
printf("Please input number:");
scanf("%ld",&i);
for(j=999;j>100;j--)
if(i%j==0)
{
 printf("The max factor with 3 digits in %ld is :%d,\n",i,j);
 break;

}
   


}